Life n Soul B106-B Bluetooth Sport Earphones, Black Bluetooth 4.0 allows for pairing with two different devices. Bluetooth capability of up to 30ft Easily switch between phone calls and music. Comfortable, noise blocking ear pieces fit to stay in your ears through intense motion. 7 hour music play time. 7 hour phone talk time. Sweat-proof coating great for working out. Once paired with the first device, B106 will automatically search for a second device for 30 seconds. If no second device is found, music will resume play with first device as usual. If second device is found, pairing will occur immediately.